Steve, you do raise a good point about what the differences are between these two bags. Based on my own scale, the new Think Tank Airport Addicted 2.0 is actually 4.5 pounds, and we have been conservative with our own claims at 4 pounds. My scale often reads 3 lbs 14 ounces on less humid days (yes, bags can hold enough humidity to really affect the scale by a number of ounces). So you are correct that we are about 1/2 pound different.
The Kiboko bag has two main compartments, and because of this the entry flaps are 1/2 as much, so you can fold one back on top of itself. This is much easier to use to gain access to your equipment.
The middle divider can be moved or removed if you wish, as it is in place with velcro. The middle divider does add rigidity to the bag, so if you remove it you will see the bag slump a bit if you stand it upright.
The Kiboko harness system is much more functional and comfortable. This is one of the main differentiators for us, as we have combined a lightweight bag with a really comfortable harness system.
And we have tons of pouches for accessories. The photos on our site aren't adequate, and we will be adding more over time. We have two outer pockets that hold a *ton* of gear, including gloves, a hat, business cards, keys, batteries, filters. You name it.
Think Tank makes great bags, and I am not knocking them at all. We just have some differences in features.
